High efficiency, save 80% power consumption. Unique design, light and beautiful. Use kinetic theory of air to solve the heat problem. Can be directly placed above the Aquarium, no scorching at all. Easy to install and use, plug into the electric outlet (85-265V AC) directly.

Combination hps/mh lamps combine a metal halide bulb and a high pressure sodium bulb in the same reflector, either with a single integrated ballast assembly or two separate ballast assemblies. The combination of blue metal halide light and red high pressure sodium light is said by manufacturers to create an ideal spectral blend and extremely high outputs, but in reality it is a compromise on both situations. These types of lights usually cost quite a bit more than a standard light and have a shorter life. Also because they use two smaller lights rather than one larger light the distance that the light penetrates is significantly shorter, in comparison to a regular hid bulb, due to the inverse square law of light. Led panel light source used in an experiment on plant growth by nasa.

Pictured plant is a potato plant. Recent advancements in leds have allowed for the production of relatively cheap, bright, and long lasting grow lights that emit only the wavelengths of light corresponding to chlorophyll's absorption peaks.

These lights are attractive to indoor growers since they do not consume as much power, do not require ballasts, and produce a fraction of the heat of hid lamps. Since there is a significant reduction in heat, time can be extended between watering cycles because the plants transpire less under led grow lights. A caution is warned to those growing with leds not to over water the plants.